SYSTEMS AND METHODS OF ROBUST DETERMINATION OF BOUNDARIES

摘要

Various embodiments include apparatus and methods to operate a drilling operation relative to formation boundaries. The apparatus and methods can include operating one or more transmitters in a borehole in a formation having a thickness between two boundaries, selecting thickness models based on applying responses from operating the one or more transmitters such that the thickness of the formation is between the two thickness models, and generating a value of a distance to a nearest boundary based on linearization of the thickness models with respect to a long distance investigation parameter and a short distance investigation parameter. Additional apparatus, systems, and methods are disclosed.

主权项

1. A method comprising:
operating one or more transmitters of one or more tools in a borehole in a formation having a thickness between two boundaries, the operation conducted according to a first parameter and a second parameter of the one or more tools, the first parameter related to formation investigation from a distance larger than an investigation related to the second parameter; selecting two thickness models based on applying responses from operating the one or more transmitters such that the thickness of the formation is between the two thickness models; and generating a value of a distance to a nearest boundary and a thickness value between the two boundaries based on linearization of the two thickness models with respect to the first parameter and the second parameter.